| pH对Az31B镁合金植酸转化膜的影响研究 |
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| 引用本文： | 高焕方,张胜涛,李羽,赵波,邹勇. pH对Az31B镁合金植酸转化膜的影响研究[J]. 腐蚀科学与防护技术, 2011, 0(6) |
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| 作者姓名： | 高焕方 张胜涛 李羽 赵波 邹勇 |
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| 作者单位： | 重庆大学化学与化工学院;重庆理工大学化学化工学院; |
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| 基金项目： | 重庆自然科学基金项目(2008BB4062)资助 |
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| 摘 要： | 采用析氢实验及Tafel极化曲线研究了AZ31B镁合金在不同pH植酸溶液中成膜时的反应速率和转化膜的防腐性能,并用SEM,AFM,EDS.FTIR观察和检定转化膜形貌、元素组成及官能团构成.结果表明溶液的pH=1时,植酸与镁合金的反应剧烈,转化膜有大量的裂纹;pH=4和pH=6时.反应速率很慢,成膜均匀并较少裂纹,但转化膜较薄;pH=2时,反应速率较为和缓.转化膜表面较为平整.有呈网格状结构的大量细小裂纹.此时,所形成的植酸转化膜具有最佳的防腐性能.此外.植酸转化膜由较薄的内层及具有一定裂纹的外层所组成,转化膜含有Mg.Al,zn,C.O.P元素及PO_4~-3,HPO_4~2-.OH~-基团.
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| 关 键 词： | 植酸 pH值 镁合金 转化膜 防腐 |
Influence of pH on Phytic Acid Conversion Films on AZ31B Magnesium Alloy |
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| GAO Huan-fang,ZHANG Sheng-tao.LI Yu,ZHAO Bo.ZOU Yong .College of Chemistry , Chemical Engineering,ChongQing University,Chongqing ,.College of Chemistry , Chemical Engineering,Chongqing University of Technology,Chongqing. Influence of pH on Phytic Acid Conversion Films on AZ31B Magnesium Alloy[J]. Corrosion Science and Protection Technology, 2011, 0(6) |
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| Authors: | GAO Huan-fang ZHANG Sheng-tao.LI Yu ZHAO Bo.ZOU Yong .College of Chemistry Chemical Engineering ChongQing University Chongqing .College of Chemistry Chemical Engineering Chongqing University of Technology Chongqing |
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| Affiliation: | GAO Huan-fang~(1.2),ZHANG Sheng-tao~1.LI Yu~2,ZHAO Bo~2.ZOU Yong~1 1.College of Chemistry and Chemical Engineering,ChongQing University,Chongqing 400030,2.College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400050 |
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| Abstract: | The reaction rate of the chemical conversion film fomation process on AZ31B magnesium alloy in phytic acid with different pH values and then the corrosion performance of the conversion films were studied by hydrogen evolution and polarization measurements.The morphology, chemical compositions and functional groups of the conversion films were characterized by SEM,AFM.EDX and FTIR.respectively.The results indicate that phytic acid could tempestuously react with magnesium alloy when pH=1,films with many big c... |
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| Keywords: | phytic acid:pH value:magnesium alloy conversion film anticorrosion |
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